问题如下：
Currency swaps are:
选项：
A.rarely used.
B.commonly used to manage interest rate risk.
C.executed by two parties making a series of interest rate payments in the same currency.
解释：
B is correct. Because interest rates and currencies are both subject to change, a currency swap has two sources of risk. Furthermore, companies operating across borders are subject to both interest rate risk and currency risk, and currency swaps are commonly used to manage these risks.
A is incorrect because currency risk is a major factor in global financial markets, and the currency derivatives market is extremely large, as opposed to small.
C is incorrect because a currency swap is executed by two parties making a series of interest rate payments to each other in different currencies, as opposed to the same currency.
不应该是汇率风险吗？
